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ASTM A182 316L spacer ring WNR 1.4404 SS Threaded Flanges

In environments that are corrosive enough to cause intergranular corrosion in welds and heat affected zones, these should use stainless steel UNS S31600/S31603 blind flanges due to its low carbon content.

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Low general corrosion rates in mildly corrosive environments give steel good resistance to atmospheric corrosion in polluted marine atmospheres. After hot working, forgings such as ASME B16.5 Sa 182 F316L slip flanges must be cooled to a specific temperature before heat treatment.

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